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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f26a5f6d2f702b5fa64ee6b7c7498d951296d0ac4df44fbcfa55d08248983839' 
  AND token = 'jbPxc7rTiHcMee15eKGMn7YIAFsPqL446xCjxBxstrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}